[time-nuts] Datum/FTS 4065B MAJOR Fault

. Also the Zeeman Beam at 0774 should be 2000 +/- 600 is out. Status 5 menu shows both Zeeman Error of -241 S.B. 160mv and Rabi-Zeeman Error at +0169 S.B. 160 mv. Any ideas what's going on? -- Have Fun, Brooke Clarke http://www.prc68.com ___ time

Re: [time-nuts] AC Connector On HP 5061B

the same transformer but only bring in the 230 VAC then neither side of the line is near ground potential. Have Fun, Brooke Clarke http://www.prc68.com/P/Prod.html Products I make and sell http://www.prc68.com/Alpha.shtml All my web pages listed based on html name http://www.PRC68.com http

Re: [time-nuts] HP105b

Hi Bill: There may be some very reasonably priced alternatives. Can you send me a photo of the pack? Have Fun, Brooke Clarke, N6GCE http://www.prc68.com/P/Prod.html Products I make and sell http://www.prc68.com/Alpha.shtml All my web pages listed based on html name http://www.PRC68.com http

Re: [time-nuts] VNG sound files

Hi Jim: The HF and LF time signals are the only broadcast time signals that have daylight savings time bits. Have Fun, Brooke Clarke http://www.prc68.com/P/Prod.html Products I make and sell http://www.prc68.com/Alpha.shtml All my web pages listed based on html name http://www.PRC68.com http

Re: [time-nuts] Odd HP 117A configuration

a receiver and it decodes WWVB time code. The same company has another program that decodes the Northern California DX beacons (as controls the receiver frequency). Note the beacons transmit in GPS controlled time slots with stepping RF power levels. Have Fun, Brooke Clarke http://www.prc68.com/P

Re: [time-nuts] Odd HP 117A configuration

Hi Chsristopher: The NCDXF page for the beacons is at: http://www.ncdxf.org/Beacons.html Have Fun, Brooke Clarke, N6GCE http://www.prc68.com/P/Prod.html Products I make and sell http://www.prc68.com/Alpha.shtml All my web pages listed based on html name http://www.PRC68.com http

Re: [time-nuts] Ancient OCXO in scope calibrator.

Hi Dave: Do you have a photo? It's been my experience that older electronic equipment fails because of poor connections rather than bad components. For many examples see: http://www.prc68.com/I/HaT.shtml Have Fun, Brooke Clarke http://www.prc68.com/P/Prod.html Products I make and sell http

Re: [time-nuts] How to get 32.768KHz from 10MHz.

source you will need to use some kind of conversion circuit. That's why it's easier to generate the 32768 Hz signal and just drive the xtal pins on the clock's IC. Have Fun, Brooke Clarke http://www.prc68.com/P/Prod.html Products I make and sell http://www.prc68.com/Alpha.shtml All my web pages

Re: [time-nuts] While we're discussing backups...

complete system may be missing something needed to be used. Have Fun, Brooke Clarke http://www.prc68.com/P/Prod.html Products I make and sell http://www.prc68.com/Alpha.shtml All my web pages listed based on html name http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com/I/WebCam2

Re: [time-nuts] I want a good micro-controller

, Brooke Clarke http://www.prc68.com/P/Prod.html Products I make and sell http://www.prc68.com/Alpha.shtml All my web pages listed based on html name http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Web Cam Chuck Harris wrote

Re: [time-nuts] Driving clocks from 1pps

in faster (crisper) and more reliable operation than using the minimum voltage and resistance which sounds sluggish and is not as reliable. Have Fun, Brooke Clarke http://www.prc68.com/P/Prod.html Products I make and sell http://www.prc68.com/Alpha.shtml All my web pages listed based on html name

Re: [time-nuts] I want a good micro-controller

but the page breaks do not show up: http://www.prc68.com/I/pdf/Brooke-16F88_LED.pdf Have Fun, Brooke Clarke http://www.prc68.com/P/Prod.html Products I make and sell http://www.prc68.com/Alpha.shtml All my web pages listed based on html name http://www.PRC68.com http://www.precisionclock.com http

Re: [time-nuts] PCB design questions

designs on a panel then you cut them apart. A money saver for prototypes. Have Fun, Brooke Clarke http://www.prc68.com/P/Prod.html Products I make and sell http://www.prc68.com/Alpha.shtml All my web pages listed based on html name http://www.PRC68.com http://www.precisionclock.com http

Re: [time-nuts] Piezo Little Wonder OCXO

Hi Rick: 10.23 MHz shows up in the ICD-200 spec on how the GPS signal is generated. I've got a GPS sig gen see: http://www.prc68.com/I/5001A.html http://www.prc68.com/I/5001Bot.html and it has an HP 10.23 MHz oscillator. Have Fun, Brooke Clarke http://www.prc68.com/P/Prod.html Products I make

Re: [time-nuts] Thoughts on IR thermometers?

problem with low cost IR temperature sensors is that the beam angle is around 90 degrees. Have Fun, Brooke Clarke http://www.prc68.com/P/Prod.html Products I make and sell http://www.prc68.com/Alpha.shtml All my web pages listed based on html name http://www.PRC68.com http://www.precisionclock.com

Re: [time-nuts] Brooke's Valpey picture

Hi Randy: Sorry, I was trying to give you a link to the Valpey VF150 data sheet, but their web site does not allow that. Have Fun, Brooke Clarke http://www.prc68.com/P/Prod.html Products I make and sell http://www.prc68.com/Alpha.shtml All my web pages listed based on html name http

Re: [time-nuts] OT: Anyone programmed HP 59306A relay actuator (or other old device)?

on the 59000 series boxes see: http://www.prc68.com/I/HP59000.shtml These are are handy when building HP-IB systems since they also allow manual control. Have Fun, Brooke Clarke http://www.prc68.com/P/Prod.html Products I make and sell http://www.prc68.com/Alpha.shtml All my web pages listed based

Re: [time-nuts] OT: Anyone programmed HP 59306A relay actuator (or other old device)?

Hi David: Sorry about that. You're correct EOI and a number of the other control signals are not used. Do you have a complete schematic, mine has the left side missing and I can't read the names of the lines. Have Fun, Brooke Clarke http://www.prc68.com/P/Prod.html Products I make

Re: [time-nuts] Valpey - VF154

, Brooke Clarke http://www.prc68.com/P/Prod.html Products I make and sell http://www.prc68.com/Alpha.shtml All my web pages listed based on html name http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Web Cam Randy Leifer wrote: Novice

[time-nuts] Datum FTS 4065B Plot

leg in the data. Maybe that's part of why the government standards are mounted on concrete pillars? Have Fun, Brooke Clarke http://www.prc68.com/P/Prod.html Products I make and sell http://www.prc68.com/Alpha.shtml All my web pages listed based on html name http://www.PRC68.com http

Re: [time-nuts] GPS receiver in GM 2001 OnStar??

like to know where the cables go from the GPS receiver. I have an idea for a movie related to OnStar. Have Fun, Brooke Clarke http://www.prc68.com/P/Prod.html Products I make and sell http://www.prc68.com/Alpha.shtml All my web pages listed based on html name http://www.PRC68.com http

[time-nuts] Datum FTS 4065B Plot

. Is there a requirement that it be in a temperature controlled room on a concrete pillar to get into the E-14 area? It just turns on better than 5E-13 and the attached plot seems to indicate that it and be manually adjusted to parts in E-14 but so far I've not been able to do that. -- Have Fun, Brooke Clarke

Re: [time-nuts] Datum FTS 4065B Plot

happens unless there's some other suggestions. I haven't got the automatic logging started yet, but it's in process. Have Fun, Brooke Clarke http://www.prc68.com/P/Prod.html Products I make and sell http://www.prc68.com/Alpha.shtml All my web pages listed based on html name http://www.PRC68

Re: [time-nuts] Measuring 10 MHz

and use a scope probe to look at the signal. The best place to trigger is at the steepest slope. Have Fun, Brooke Clarke http://www.prc68.com/P/Prod.html Products I make and sell http://www.prc68.com/Alpha.shtml All my web pages listed based on html name http://www.PRC68.com http

Re: [time-nuts] Updated GPS Interface docs available

– WNotGGTO))2) where tGNSS is in seconds, tE and WN are as defined in Section 20.3.3.5.2.4 of IS-GPS-200, and the remaining parameters are as defined in Table 20-XI. Apparently there is a bias offset and drift between GPS time and GNSS time. Have Fun, Brooke Clarke http://www.prc68.com/P/Prod.html

Re: [time-nuts] Low profile coax connector?

Hi Dave: How about a photo and some dimensions? Have Fun, Brooke Clarke http://www.prc68.com/P/Prod.html Products I make and sell http://www.prc68.com/Alpha.shtml All my web pages listed based on html name http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com/I/WebCam2.shtml

[time-nuts] Altitude Effect on Cesium Standard?

performance. I assume this means without any adjustments, i.e. power up and that's what you get. Do you have a feel how well your Cesium standards set themselves? -- Have Fun, Brooke Clarke http://www.prc68.com/P/Prod.html Products I make and sell http://www.prc68.com/Alpha.shtml All my web

Re: [time-nuts] Measuring 10 MHz accurately.

to drive the external clock input to get the 1 kHz reference. But you could use Toms PIC divider to generate a 1 kHz signal from about any test signal and use the same method. http://www.prc68.com/I/FTS4060.shtml#SR620Fast http://www.prc68.com/I/TandFTE.shtml#SR620 Have Fun, Brooke Clarke http

Re: [time-nuts] Zeta Labs X76 Multiplier 7600 MHz Output Model 5856-01

Hi Matt: Is it possible to make a DC measurement (DMM Diode function) of the SRD forward and reverse voltage? Have Fun, Brooke Clarke http://www.prc68.com/P/Prod.html Products I make and sell http://www.prc68.com/Alpha.shtml All my web pages listed based on html name http://www.PRC68.com

Re: [time-nuts] Favorite DC power Supply?

. Although I have many other supplies this one ends up right next to me and works for almost everything. I'm attaching a photo I just took of the front panel. Have Fun, Brooke Clarke http://www.prc68.com/P/Prod.html Products I make and sell http://www.prc68.com/Alpha.shtml All my web pages listed

Re: [time-nuts] any experts at repairing WaveTek 288's?

Hi Scott: I've found with older equipment the most common by far problem is oxidized electrical joints. Most of the time simply cycling all the connections will restore operation. For more on that see: http://www.prc68.com/I/HaT.shtml Have Fun, Brooke Clarke http://www.prc68.com/P/Prod.html

[time-nuts] LEA-5T Precision Timing GPS module

. USB2, UART and SPI interfaces. The 15 ns number related to the 1 PPS seems to be saying they output the sawtooth error number but the user needs to make the correction. 30 ns RMS without the sawtooth correction. http://www.u-blox.com/products/lea_5t.html -- Have Fun, Brooke Clarke http

[time-nuts] Y2K again: Tuesday 03:14:07 GMT, January 19, 2038

Hi: This is the rollover date for C language date functions that count the seconds since 00:00:00 1 Jan 1970 with a signed 32 bit integer. One second after after 03:14:07 GMT, January 19, 2038 is in 1901. -- Have Fun, Brooke Clarke http://www.prc68.com/P/Prod.html Products I make and sell

Re: [time-nuts] Y2K again: Tuesday 03:14:07 GMT, January 19, 2038

Hi: I should have mentioned the failures have just started. If you subtract 30 years from the subject date you get: 03:14:07 GMT, January 19, 2008 Financial institutions that do 30 year mortgage calculations are the ones who were bitten. Have Fun, Brooke Clarke http://www.prc68.com/P

Re: [time-nuts] 5 MHZ PIC PPS Divider?

than 130 ms? Hard to say what hold means when talking about 24 bit conversions. I'm not sure of how droop would effect the result. I'm asking because the LTC2400 is about $8 compared to the LTC1273A for $25. Have Fun, Brooke Clarke http://www.prc68.com/P/Prod.html Products I make and sell http

Re: [time-nuts] PIN diode shunt clamp

Hi Shane: No. It's a long lifetime PIN. Limiter PINs must have a lifetime short enough that they have some retification efficiency. See attached schematic. Have Fun, Brooke Clarke http://www.prc68.com/P/Prod.html Products I make and sell http://www.prc68.com/Alpha.shtml All my web pages

Re: [time-nuts] Adding prescaler to HP 5334B

microwave Schottky diodes they put a reverse recovery time spec on them when in fact it was zero. For more on Microwave Diodes see: http://www.prc68.com/I/Diodes.html Have Fun, Brooke Clarke http://www.prc68.com/P/Prod.html Products I make and sell http://www.prc68.com/Alpha.shtml All my web

Re: [time-nuts] Difference between Datum 4065, A, B C Cesium TF standard?

. This could be GPS disciplined using RS-232 to tweak the frequency. Maybe that's how the Frequency Offset came to be non zero. I don't have a feel for how well the automatic adjustments actually work, maybe Tom can comment? Have Fun, Brooke Clarke http://www.prc68.com/P/Prod.html

Re: [time-nuts] Difference between Datum 4065, A, B C Cesium TF standard?

, Brooke Clarke http://www.prc68.com/P/Prod.html Products I make and sell http://www.prc68.com/Alpha.shtml All my web pages listed based on html name http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Web Cam Tom Van Baak wrote: A two

[time-nuts] Trick to setting Date-Time on FTS 4065 Cesium std?

Hi: I've got the Datum 4065B Cesium Time and Frequency standard locked and the alarm light is off, but it doesn't want to accept the date time input. Is there some trick to getting it set? -- Have Fun, Brooke Clarke http://www.prc68.com/P/Prod.html Products I make and sell http://www.prc68

Re: [time-nuts] Trick to setting Date-Time on FTS 4065 Cesium std?

Hi: Never mind. Cockpit problem, it's working fine. Have Fun, Brooke Clarke http://www.prc68.com/P/Prod.html Products I make and sell http://www.prc68.com/Alpha.shtml All my web pages listed based on html name http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com/I/WebCam2

Re: [time-nuts] Component level 1:2 splitter

other caused problems, but 6 inches of separation was all that was needed for isolation. Have Fun, Brooke Clarke http://www.prc68.com/P/Prod.html Products I make and sell http://www.prc68.com/Alpha.shtml All my web pages listed based on html name http://www.PRC68.com http://www.precisionclock.com

Re: [time-nuts] Mounting GPS Antenna on Steel Roof

Hi Matthew: Some antennas are receptive to signals coming up from below. Since the signal is circularly polarized the first reflection is supposed to be down something like 20 dB, but the second reflection will be much stronger, so you would also need to look at those. Have Fun, Brooke

[time-nuts] Difference between Datum 4065, A, B C Cesium TF standard?

Hi: Can someone tell me the difference between the various versions of the 4065 Cesium TF standard? -- Have Fun, Brooke Clarke http://www.prc68.com/P/Prod.html Products I make and sell http://www.prc68.com/Alpha.shtml All my web pages listed based on html name http://www.PRC68.com http

Re: [time-nuts] The Original Time Nut

1) at: http://www.leapsecond.com/hsn2006/ch1.htm Have Fun, Brooke Clarke http://www.prc68.com/P/Prod.html Products I make and sell http://www.prc68.com/Alpha.shtml All my web pages listed based on html name http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com/I/WebCam2.shtml

Re: [time-nuts] PRN#32 signal not happening

Hi Poul: What do you mean by that? I don't see the connection with USA 193. Have Fun, Brooke Clarke http://www.prc68.com/P/Prod.html Products I make and sell http://www.prc68.com/Alpha.shtml All my web pages listed based on html name http://www.PRC68.com http://www.precisionclock.com http

Re: [time-nuts] GPS PRN vs SV...??

? Have Fun, Brooke Clarke http://www.prc68.com/Alpha.shtml All my web pages listed based on html name http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Web Cam ___ time-nuts mailing list

Re: [time-nuts] Clock Powers of Ten

.html I think in your Powers of Ten you showed a timepiece for which I don't remember any data. Since it's shown on the last page does that mean the hour glass has very good specs? Have Fun, Brooke Clarke http://www.prc68.com/Alpha.shtml All my web pages listed based on html name http

[time-nuts] William Shortt's personal clock (No. 7) for auction

Hi: You might find this one interesting: http://www.christies.com/LotFinder/lfsearch_coa/LotDescription.aspx?intObjectID=5039672 -- Have Fun, Brooke Clarke http://www.prc68.com/Alpha.shtml All my web pages listed based on html name http://www.PRC68.com http://www.precisionclock.com http

Re: [time-nuts] William Shortt's personal clock (No. 7) for auction

Hi Tom: I like that page, but like http://www.leapsecond.com/hsn2006/ch1.htm even more. You might cross link them. How's Chapter 2 coming? My latest clock is: http://www.prc68.com/I/Shadow-Clock.shtml Have Fun, Brooke Clarke http://www.prc68.com/Alpha.shtml All my web pages listed based

[time-nuts] 19 20 Jan UTC HAARP-LWA Moon Bounce Schedule

2008 06:3007:30 6.7925 07:3008:30 7.4075 They are looking for Moon bounce. More info at: http://www.haarp.alaska.edu/haarp/mbann.html -- Have Fun, Brooke Clarke http://www.prc68.com/Alpha.shtml All my web pages listed based on html name

Re: [time-nuts] accurate portable time source

Hi Ronald: Not yet. Right now I'm having fun with old DC motors and Flashlights. http://www.prc68.com/I/EM_ToyEngine.shtml http://www.prc68.com/I/Gilbert-Motor.shtml http://www.prc68.com/I/Weeden-El-Motor.shtml http://www.prc68.com/I/FlashlightPat.shtml Have Fun, Brooke Clarke http://www.PRC68

Re: [time-nuts] accurate portable time source

Hi Ronald: The last LCD clock I made had the pads for a DS3231 but for various reasons I never installed it. http://www.prc68.com/I/PRC68COM.shtml#07092006 Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather

Re: [time-nuts] accurate portable time source

or T2XO. I like this one for a practical product. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Cam Ronald Held wrote: This request is different than the last one. The most accurate TCXO watch is about 1

Re: [time-nuts] OT: Hewlett Packard paint codes

Hi Jack: If you have a piece of equipment that has the desired color, just take it to you local paint store (Kelly More, etc) where they should have a digital colorimeter. They can then blend a paint that when dry will be the same. Have Fun, Brooke Clarke http://www.PRC68.com http

Re: [time-nuts] Efratom M100 oscillator connector

Hi Mike: See: http://www.prc68.com/I/O1814.shtml#M100 You might have better luck looking for Winchester connector. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Cam mlmccauley wrote: I got a really

Re: [time-nuts] Discussion of precise time and frequency measurement

in the northern hemisphere will not see too many sats. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Cam Ronald Held wrote: Since the moving option is out, perhaps I need to investigate whether I currently

Re: [time-nuts] Time Transfer

to determine what the propagation is between a given transmitter and receiver. Since the chirp receiver knows exactly what the propagation is it should make for a more acccurate HF timing receiver. http://www.prc68.com/I/RCS-5A.shtml Have Fun, Brooke Clarke http://www.PRC68.com http

Re: [time-nuts] Upgrading possibilities for more accurate, precise stable time system

. CDMA cell phone is microwave. VLF military stations are used to send subs encrypted messages and have well controlled carriers. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Cam Ronald Held wrote

Re: [time-nuts] Time Transfer

that are on even second Lat and lon numbers, like 39:11:25.0. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Cam Didier Juges wrote: Hi Brooke, Thank you for your suggestions, that page is probably ripe

Re: [time-nuts] Time Transfer

about how good the data was. This is just for me not any legal reason. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Cam Hal Murray wrote: I hired the local surveyor who does GPS to locate my antenna

[time-nuts] Time Transfer

there may be a slight change in accuracy because of the satellites being used. But changing from a satellite that's about to set i.e. that has a lot of multipath to high in the sky sat should make for a better 1 PPS. -- Have Fun, Brooke Clarke http://www.PRC68.com http

Re: [time-nuts] 1Mhz to 1 PPS

Hi Jeff: Another way is using a PIC micro controller, see: http://www.prc68.com/I/PRC68COM.shtml#TVB http://www.leapsecond.com/tools/PPSDIV.ASM Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Cam jshank

Re: [time-nuts] OT: Prologix GPIB and HP3478A...

Hi Chuck: It may be timing. The 85 and the 3478 are old and slow. Have you tried adding wait statements after you send any command to give the 3478 time to think about it? Also it may be good to send CRLFEOI after each command then do the wait. Have Fun, Brooke Clarke http://www.PRC68

Re: [time-nuts] Loran-C Receivers

://www.thinksrs.com/products/FS700.htm My Austron page is: http://www.prc68.com/I/A2100F.shtml Have Fun, Brooke Clarke, N6GCE http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Cam Stan W1LE wrote: ); SAEximRunCond expanded to false

Re: [time-nuts] GPS Jamming in the UK

jamming that will disrupt civilian/enemy GPS receivers yet allow a crypto keyed US GPS receiver to function. This would be done near a battle zone and so would not effect the GPS system in other locations. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com http://www.prc68

Re: [time-nuts] LORAN-C

); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY Hi: Here is a plot from 0 to 200 kHz that shows LORAN-C, WWVB and the interfering military RTTY stations. http://www.prc68.com/I/Images/AMRAD_BT.GIF Ext Ref is the GPS locked PRS10 Rb. Have Fun, Brooke Clarke http

Re: [time-nuts] Datum 9390-6000 Problem

receiver. See: http://www.prc68.com/I/Trimpack.shtml#Ant Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Cam Mitchell Janoff wrote: Greetings all. I have a Datum 9390-6000 with the Rubidium frequency

[time-nuts] Mini Magnetic Sensor May Have Biomedical, Security Applications

be done using the Rb cell from a frequency standard? -- Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Cam ___ time-nuts mailing list -- time-nuts@febo.com

Re: [time-nuts] OT: AC voltage standard

); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY Hi John: How does it compare to the Linear LTZ1000? Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Cam Neon John wrote

Re: [time-nuts] Fury Interface Board: How about TI OPA277?

Option 7 0 to 6 V, 3 V nominal, +0.75 Hz/V Option 8 0 to 6 V, 3 V nominal, -0.75 Hz/V Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Cam Bruce Griffiths wrote: ); SAEximRunCond expanded

Re: [time-nuts] Re-triggerable Monostable?

); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY Hi Grant: Your re-triggerable monostable idea has been implemented and is called a missing pulse detector. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com/I/WebCam2.shtml 24/7

Re: [time-nuts] Scopes and 1 PPS signals?

/ 32 Hz. Seems a strange number. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Cam Didier Juges wrote: Some DSOs (my lowly Tek 210 does) have a peak detect acquisition mode where it will analyze

[time-nuts] STANAG 4430?

); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY Hi: I think the Q-1814 uses STANAG 4430 for the Time Of Day interface. Does anyone have a copy they can emial to me? http://www.prc68.com/I/O1814.shtml -- Have Fun, Brooke Clarke http://www.PRC68.com http

Re: [time-nuts] STANAG 4430?

is not set, how to handshake and/or request a transfer, etc. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Cam Rob Kimberley wrote: Brooke, See the attached which I put together for a project some time

Re: [time-nuts] Scopes and 1 PPS signals?

title (or the old server) GRC-206(V)1 can be fitted with Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Cam Dave Brown wrote: ); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY

Re: [time-nuts] Parallel voltage regulators

than the battery voltage when the oven is warmed up then the diode disconnects the battery. A resistor shunting the diode will then set a small charging current. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather

[time-nuts] Scopes and 1 PPS signals?

to be measured that don't cost an arm and leg? -- Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Cam ___ time-nuts mailing list -- time-nuts@febo.com

Re: [time-nuts] Scopes and 1 PPS signals?

faster than the main trace which would be 20 ms/sq, way too slow to see the pulse. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Cam Alan Melia wrote: ); SAEximRunCond expanded to false Errors-To: [EMAIL

Re: [time-nuts] Scopes and 1 PPS signals?

it on the scope. BillWB6BNQ Brooke Clarke wrote: Hi: While trying to figure out the O-1814 Rb source I found a 1 PPS signal that's less than 10 us wide. But using an HP 54501A DSO it's almost impossible to determine the period. http://www.prc68.com/I/O1814.shtml If the display is 1,000

Re: [time-nuts] Scopes and 1 PPS signals?

); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY Hi Daun: The previous message suggested using a 74123 one shot, and the FatPPS uses a 74HC123. But $45 seems a bit high for just this measurement. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com

Re: [time-nuts] Scopes and 1 PPS signals?

Ohm coax cables. Tried to get them at Radio shack but they no longer carry any 50 Ohm cables or bulk cable. Any recommendations for good value coax that's on line? Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather

Re: [time-nuts] Scopes and 1 PPS signals?

. The 100 MHz 2 analog channel 16 digital channels is very reasonably priced. But after 3 emails I still have not been able to see a programming manual for it. Although they do have a software package. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com http

Re: [time-nuts] Info O-1814 Rb Freq srd

); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY Hi Nigel: Thanks very much for that link. I'm even more impressed by the M-100 Rb. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy

[time-nuts] Time Interval Counter by Standard Electric Time Co

in a movie or documentary. Still looking for info on the O-1814/GRC-206 Rb source and it's Efratom M100 Rb brick. see: http://www.prc68.com/I/O1814.shtml -- Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather

[time-nuts] Info Wanted on O-1814/GRC-206 Rubidium Frequency Standard

); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY Hi: I've received this unit, but know nothing about it. Need power connector voltages and pinout, manual or whatever I can find out. O-1814/GRC-206 Rubidium Frequency Standard -- Have Fun, Brooke Clarke http://www.PRC68

Re: [time-nuts] Improving the stability of crystal oscillators

. The Wisconsin data was in loam which I think means a fairly good insulator. They had the widest temperature variation (15 c delta @ 120 cm down). I've got sand and clay after the first foot or so which may be a better thermal conductor implying less variation. Have Fun, Brooke Clarke http

Re: [time-nuts] Improving the stability of crystal oscillators

to work. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Cam Don Collie wrote: ); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY Has anyone concidered using a small Peltier pile

[time-nuts] Improving the stability of crystal oscillators

sensors on the copper and aluminum. If the thermal time constant could be made very close to 24 hours, or integer multiples of that, it might be possible to predict the inner temperature allowing compensation. Has this already been done? -- Have Fun, Brooke Clarke http://www.PRC68.com http

Re: [time-nuts] Improving the stability of crystal oscillators

have just used the long time constant to slow down the changes, or was he actually using the time of day as a function of frequency? Have Fun, Brooke Clarke, N6GCE http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Cam Richard W

Re: [time-nuts] Improving the stability of crystal oscillators

Hi Bruce: Details on your experiment please. Hole/pipe diameter, material? Depth? Delta T at different depths vs surface ambient? Soil type? Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Cam Bruce

Re: [time-nuts] Improving the stability of crystal oscillators

/wiki/Clapp_oscillator In the 1930s GR patents he's showing an inductor in series with the crystal and Wiki dates the Clapp Oscillator 1948 where a capacitor is in series. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com/I/WebCam2.shtml 24/7 Sky

Re: [time-nuts] Improving the stability of crystal oscillators

. This was done for the HP E1938 10 MHz oscillator, see: http://www.prc68.com/I/HPE1938.shtml and the paper: The Theory Of Zero Gradient Crystal Ovens, R.K. Karlquist, L.S. Cutler, E.M. Ingman, J.L. Johnson, T. Parisek Have Fun, Brooke Clarke, N6GCE http://www.PRC68.com http

Re: [time-nuts] Improving the stability of crystal oscillators

, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Cam [EMAIL PROTECTED] wrote: ); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY Try DigiKey pn: 235-1123-ND for a simple PTC Thermistor that can

Re: [time-nuts] HP 523B frequency counter Sputnik

, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Cam Tom Van Baak wrote: A little known piece of Sputnik history... http://www.hparchive.com/Journals/HPJ-1957-09-Sputnik.pdf /tvb

Re: [time-nuts] Brooks Shera

); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY Hi Peter: The code on that page is for the divider that Tom did in a PIC. It's not the Shera GPSDO. http://www.prc68.com/I/PRC68COM.shtml#TVB Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com http

Re: [time-nuts] Austron 2000C on EBay

the analog meter and mechanical switches instead of the pushbuttons and LCD. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Cam Don Johnson wrote: ); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED

Re: [time-nuts] E1938

); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY Hi Rick: If the aging drift is up in frequency then there might be an advantage in starting at the low end of the window. Any idea of how these age? Have Fun, Brooke Clarke http://www.PRC68.com http

Re: [time-nuts] E1938

/index_fs.htm Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Cam Rick Karlquist wrote: ); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY This question keeps coming up in relation

Re: [time-nuts] time-nuts, frequency counters

indicators to cause confusion. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Cam CHazlitt wrote: ); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY Hello, I just joined the group

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